#include<stdio.h>

struct Books
{
    char title[50];
    char author[50];
    char subject[100];
    int book_id;

} book = {"C 语言", "BUNOOB", "编程语言", 123456};

int main()
{
    printf("title :%s\n author: %s subject: %s\n book_id: %d\n", book.title, book.author, book.subject, book.book_id);
}